/Engine/Source/Editor/UnrealEd/Public/ConvexDecompositionNotification.h
To make the convex decomposition notification appear, you simply set 'IsActive' to true and assign the current status message in 'Status'. Use the 'GConvexDecompositionNotificationState' pointer to get access to the global notification state.
class FConvexDecompositionNotificationState
bool
IsActive
FString
Status